Magnetic levitation high-speed motor controller

Abstract

This invention discloses a magnetic levitation high-speed motor controller, including a main control circuit and a displacement control circuit. The main control circuit is connected to the displacement control circuit. The displacement control circuit includes at least one digital potential module, which comprises a potential processing unit, a decoder, and a digital potential application circuit. The output of the potential processing unit is connected to the input of the decoder and the input of the digital potential application circuit, and the output of the decoder is connected to the input of the digital potential application circuit. The decoder receives the set output signal from the potential processing unit, forms a chip select signal for controlling the digital potential application circuit, and sends it to the digital potential application circuit. The magnetic levitation high-speed motor controller proposed in this invention can improve control accuracy, reduce errors, and improve product consistency and stability, thereby making the motor performance of the product more reliable.

Description

Technical Field

[0001] This invention belongs to the field of magnetic levitation motor technology, and relates to a magnetic levitation high-speed motor, and more particularly to a magnetic levitation high-speed motor controller. Background Technology

[0002] In the control system of high-speed magnetic levitation motors, the existing technology commonly uses analog controllers for the on-axis magnetic levitation and its precision control. However, using analog controllers requires adjusting and setting various parameters of the high-speed motor; this is a tedious and demanding task.

[0003] Existing products typically employ traditional industrial debugging methods: using a screwdriver to rotate an analog potentiometer, adjusting the circuit parameters by changing the potentiometer's resistance value, and then using an oscilloscope or multimeter to display the voltage value and observe the adjustment effect. This debugging method is prone to errors due to manual operation and suffers from poor consistency, instability, and unreliable performance. Furthermore, existing debugging methods involve numerous instruments, are time-consuming and labor-intensive, and have low work efficiency.

[0004] In view of this, there is an urgent need to design a new high-speed motor commissioning method in order to overcome at least some of the aforementioned defects in existing high-speed motor commissioning methods. Summary of the Invention

[0005] This invention provides a magnetic levitation high-speed motor controller, which can improve control accuracy, reduce errors, and improve product consistency and stability, thereby making the motor performance of the product more reliable.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the following technical solution is adopted:

[0007] A magnetic levitation high-speed motor controller, the magnetic levitation high-speed motor controller comprising: a main control circuit and a displacement control circuit, the main control circuit being connected to the displacement control circuit;

[0008] The displacement control circuit includes at least one digital potential module, which includes a potential processing unit, a decoder, and a digital potential application circuit.

[0009] The output terminal of the potential processing unit is connected to the input terminal of the decoder and the input terminal of the digital potential application circuit, and the output terminal of the decoder is connected to the input terminal of the digital potential application circuit.

[0010] The decoder is used to receive the set output signal of the potential processing unit, form a chip select signal for controlling the digital potential application circuit, and send it to the digital potential application circuit.

[0011] In one embodiment of the present invention, the decoder includes a decoder integrated circuit, and the digital potential application circuit includes a digital potentiometer; the IO signal output by the IO interface circuit of the potential processing unit is decoded by the decoder into a chip select signal for controlling the digital potentiometer in the digital potential application circuit.

[0012] In one embodiment of the present invention, PI D_P_CH1 is the chip select signal line of the proportionally amplified digital potentiometer in the first degree of freedom PI D circuit.

[0013] As one embodiment of the present invention, the displacement control circuit includes a zero-point position control circuit and an amplitude position control circuit;

[0014] In one embodiment of the present invention, the displacement control circuit includes a zero-point position control circuit and an amplitude position control circuit, wherein the zero-point position control circuit is connected to the amplitude position control circuit.

[0015] In one embodiment of the present invention, the zero-point position control circuit includes a first chip U11, an eighth chip U8A, a second capacitor C2, a first resistor R19, and a second resistor R25; the amplitude position control circuit includes a first chip U16, an eighth chip U8B, and a fifth resistor R51.

[0016] The output terminal of the eighth A chip U8A is connected to the non-inverting input terminal of the eighth B chip U8B; the non-inverting input terminal of the eighth A chip U8A is connected to the second terminal of the first nine resistor R19, the first terminal of the second five resistor R25, and the first terminal of the second capacitor C2 respectively; the first terminal of the first nine resistor R19 is connected to the POW pin of the first one chip U11; the second terminal of the second five resistor R25 and the second terminal of the second capacitor C2 are respectively grounded;

[0017] The inverting input terminal of the eighth chip U8B is connected to the POB pin of the first sixth chip U16 and the first terminal of the fifth resistor R51, respectively; the second terminal of the fifth resistor R51 is grounded; the output terminal of the eighth chip U8B is connected to the POW pin of the first sixth chip U16.

[0018] In one embodiment of the present invention, the first chip U11 and the first sixth chip U16 are both digital potentiometers, and the fifth A chip U5A, the eighth A chip U8A, and the eighth B chip U8B are operational amplifiers.

[0019] As one embodiment of the present invention, the displacement control circuit further includes a differential circuit and a low-pass filter circuit;

[0020] The differential circuit includes a fifth A chip U5A, a fourth and fifth capacitor C45, a fourth and sixth capacitor C46, ​​a seventh and fourth resistor R74, a seventh and fifth resistor R75, a seventh and sixth resistor R76, and a seventh and seventh resistor R77.

[0021] The low-pass filter circuit includes a fifth and seventh capacitor C57, a sixth and third capacitor C63, a first resistor R1, a seventh resistor R7, and a first and third resistor R13.

[0022] The inverting input terminal of the fifth A chip U5A is connected to the second terminal of the seventh fourth resistor R74, the second terminal of the seventh fifth resistor R75, and the second terminal of the fourth sixth capacitor C46, ​​respectively.

[0023] The output terminal of the fifth A chip U5A is connected to the first terminal of the seventh fourth resistor R74, the first terminal of the fourth sixth capacitor C46, ​​and the first terminal of the first resistor R1, respectively.

[0024] The second end of the first resistor R1 is connected to the second end of the seventh resistor R7, the first end of the first third resistor R13, and the first end of the fifth seventh capacitor C57; the second end of the fifth seventh capacitor C57 is grounded.

[0025] The output terminal of the eighth A chip U8A is connected to the first terminal of the seventh resistor R7 and the first terminal of the sixth capacitor C63, respectively; the inverting input terminal of the eighth A chip U8A is connected to the second terminal of the first resistor R13 and the second terminal of the sixth capacitor C63, respectively.

[0026] The beneficial effects of this invention are as follows: the magnetic levitation high-speed motor controller proposed in this invention can improve the control accuracy, reduce errors, and improve the consistency and stability of the product, thereby making the motor performance of the product more reliable. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the composition of a magnetic levitation high-speed motor controller in one embodiment of the present invention.

[0028] Figure 2 This is a circuit diagram of a decoder in one embodiment of the present invention.

[0029] Figure 3 This is a circuit diagram of a digital potential application circuit in one embodiment of the present invention. Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0031] To further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the scope of the claims of the present invention.

[0032] The description in this section pertains to only a few typical embodiments, and the present invention is not limited to the scope of the embodiments described. Substitution of identical or similar prior art methods with some technical features in the embodiments is also within the scope of the description and protection of this invention.

[0033] The term "connection" in the specification includes both direct and indirect connections, such as connections made through active devices, passive devices, or electrical conduction media; it may also include connections made by other active or passive devices that are known to those skilled in the art and can achieve the same or similar functional purpose, such as connections made through circuits or components such as switches or follower circuits.

[0034] This invention discloses a magnetic levitation high-speed motor controller. Figure 1 This is a schematic diagram of the composition of a magnetic levitation high-speed motor controller in one embodiment of the present invention; please refer to [link / reference]. Figure 1 The magnetic levitation high-speed motor controller includes a main control circuit 1 and a displacement control circuit 2, wherein the main control circuit 1 is connected to the displacement control circuit 2. The displacement control circuit 2 includes at least one digital potential module, wherein the digital potential module includes a potential processing unit 21, a decoder 22, and a digital potential application circuit 23.

[0035] The output of the potential processing unit 21 is connected to the input of the decoder 22 and the input of the digital potential application circuit 23, and the output of the decoder 22 is connected to the input of the digital potential application circuit 23. The decoder 22 is used to receive the setting output signal of the potential processing unit 21, form a chip select signal for controlling the digital potential application circuit, and send it to the digital potential application circuit 23.

[0036] The potential processing unit 21 can be a microcontroller system; the microcontroller system is connected to the serial interface of the digital potentiometer through a serial interface, one part of the microcontroller's IO interface controls the control terminal of the digital potentiometer, and the other part of the microcontroller's IO interface controls the chip select signal of the digital potentiometer through a decoder, thereby controlling the digital potentiometer; the adjustment and setting of various analog circuit parameters are set and adjusted through communication between the host computer software and the lower computer controller.

[0037] The microcontroller system of this invention can use the STM32H743I I T6 released by STMicroelectronics. This processor uses a 32-bit ARM Cortex-M7 core, with a double-precision FPU and L1 cache, a frequency of up to 480MHz, 2MB of FLASH memory supporting read and write operations, and 1MB of RAM. It internally includes 3 A / D converters supporting up to 16 bits, multiple serial interfaces, and other peripherals. It is very powerful. The processor is designed to operate on a 3.3V power supply, and the I / O uses +3.3V.

[0038] In the 3V to 5V IO interface circuit of this embodiment, U3 is a dual-power supply (3.3V to 5V) integrated circuit supporting 8-bit tri-state data conversion and output. The 3.3V SPI interface signal of the microcontroller system is converted to a 5V signal to control the SPI interface circuit of the digital potentiometer. LDO1 is a power converter, converting +5V voltage to +3V power. C201, C1, C202, and C2 are filter capacitors. Thus, the microcontroller system operates at +3.3V, and the IO port output is +5V, providing the system with anti-interference capability.

[0039] Figure 2 This is a circuit diagram of a decoder in one embodiment of the present invention; please refer to [link / reference]. Figure 2 In one embodiment of the present invention, the decoder 22 includes a decoder integrated circuit, and the digital potentiometer application circuit includes a digital potentiometer; the IO signal output by the IO interface circuit of the potentiometer processing unit 21 is decoded by the decoder 22 into a chip select signal that controls the digital potentiometer in the digital potentiometer application circuit 23. For example, PI D_P_CH1 is the chip select signal line of the proportionally amplified digital potentiometer in the first degree of freedom PI D circuit.

[0040] Figure 3 This is a circuit diagram of a digital potential application circuit in one embodiment of the present invention; please refer to [link / reference]. Figure 3 In one embodiment of the present invention, the technical solution of the present invention is applied to the control circuit of the magnetic levitation high-speed motor control system, using a digital potentiometer to control the zero-point position and amplitude position. The displacement control circuit 2 includes a zero-point position control circuit and an amplitude position control circuit, with the zero-point position control circuit connected to the amplitude position control circuit.

[0041] In one embodiment of the present invention, the zero-point position control circuit includes a first chip U11, an eighth chip U8A, a second capacitor C2, a first resistor R19, and a second resistor R25; the amplitude position control circuit includes a first chip U16, an eighth chip U8B, and a fifth resistor R51.

[0042] The output terminal of the eighth A chip U8A is connected to the non-inverting input terminal of the eighth B chip U8B; the non-inverting input terminal of the eighth A chip U8A is connected to the second terminal of the first nine resistor R19, the first terminal of the second five resistor R25, and the first terminal of the second capacitor C2 respectively; the first terminal of the first nine resistor R19 is connected to the POW pin of the first one chip U11; the second terminal of the second five resistor R25 and the second terminal of the second capacitor C2 are respectively grounded.

[0043] The inverting input terminal of the eighth chip U8B is connected to the POB pin of the first sixth chip U16 and the first terminal of the fifth resistor R51, respectively; the second terminal of the fifth resistor R51 is grounded; the output terminal of the eighth chip U8B is connected to the POW pin of the first sixth chip U16.

[0044] The first chip U11 and the first six chip U16 can be digital potentiometers, and the fifth A chip U5A, the eighth A chip U8A, and the eighth B chip U8B can be operational amplifiers.

[0045] Furthermore, the displacement control circuit may further include a differential circuit and a low-pass filter circuit. For example... Figure 3 As shown, the differential circuit includes a fifth A chip U5A, a fourth and fifth capacitor C45, a fourth and sixth capacitor C46, ​​a seventh and fourth resistor R74, a seventh and fifth resistor R75, a seventh and sixth resistor R76, and a seventh and seventh resistor R77. The low-pass filter circuit includes a fifth and seventh capacitor C57, a sixth and third capacitor C63, a first resistor R1, a seventh resistor R7, and a first and third resistor R13.

[0046] The inverting input terminal of the fifth A chip U5A is connected to the second terminal of the seventh-fourth resistor R74, the second terminal of the seventh-fifth resistor R75, and the second terminal of the fourth-sixth capacitor C46, ​​respectively. The output terminal of the fifth A chip U5A is connected to the first terminal of the seventh-fourth resistor R74, the first terminal of the fourth-sixth capacitor C46, ​​and the first terminal of the first resistor R1, respectively. The second terminal of the first resistor R1 is connected to the second terminal of the seventh resistor R7, the first terminal of the first-third resistor R13, and the first terminal of the fifth-seventh capacitor C57, respectively. The second terminal of the fifth-seventh capacitor C57 is grounded.

[0047] The output terminal of the eighth A chip U8A is connected to the first terminal of the seventh resistor R7 and the first terminal of the sixth capacitor C63, respectively; the inverting input terminal of the eighth A chip U8A is connected to the second terminal of the first resistor R13 and the second terminal of the sixth capacitor C63, respectively.

[0048] The paired induced voltage signals IN+ and IN- generated by the eddy current sensor are used to generate a bearing position displacement signal voltage through a differential circuit. This signal voltage first passes through a low-pass filter circuit and then enters the zero-point adjustment circuit. The microcontroller system controls the output of U11, which outputs an intermediate resistance value W_W1, thereby controlling the potential at that terminal and thus the zero-point potential of the position displacement signal. The bearing position displacement signal voltage then enters the amplitude amplification circuit. The microcontroller system controls the resistance between W_W2 and W_B2 output by U16, thereby controlling the amplification factor of the U8B amplifier circuit and thus controlling the amplitude of the position displacement signal. In this way, the signal voltage value of the bearing's extreme position displacement can be adjusted.

[0049] In summary, the magnetic levitation high-speed motor controller proposed in this invention can improve control accuracy, reduce errors, and enhance product consistency and stability, thereby making the motor performance of the product more reliable.

[0050] In one application scenario, this invention uses a digital potentiometer instead of an analog potentiometer. By adjusting and setting various circuit parameters through communication between the host computer and the slave computer controller, the drawbacks of fluctuating digital values ​​caused by manual error can be reduced. This effectively improves product consistency and stability, thereby making the motor performance of the product more reliable. Furthermore, this invention eliminates unnecessary instruments and meters, effectively improving work efficiency. This invention can be used in centrifugal blowers, wind and solar generators, and other fields.

[0051] It should be noted that this application can be implemented in software and / or a combination of software and hardware; for example, it can be implemented using an application-specific integrated circuit (ASIC), a general-purpose computer, or any other similar hardware device. In some embodiments, the software program of this application can be executed by a processor to implement the steps or functions described above. Similarly, the software program of this application (including related data structures) can be stored in a computer-readable recording medium; for example, RAM memory, magnetic or optical drives, floppy disks, and similar devices. In addition, some steps or functions of this application can be implemented in hardware; for example, as circuitry that cooperates with a processor to perform the various steps or functions.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The description and application of the present invention herein are illustrative and not intended to limit the scope of the invention to the embodiments described above. Effects or advantages involved in the embodiments may not be apparent due to various factors, and the description of effects or advantages is not intended to limit the embodiments. Variations and modifications of the embodiments disclosed herein are possible, and various substitutions and equivalents of the components in the embodiments are well known to those skilled in the art. It should be apparent to those skilled in the art that the invention can be implemented in other forms, structures, arrangements, proportions, and with other components, materials, and parts without departing from the spirit or essential characteristics of the invention. Other variations and modifications can be made to the embodiments disclosed herein without departing from the scope and spirit of the invention.

Claims

1. A magnetic levitation high speed motor controller characterized by, The magnetic suspension high-speed motor controller comprises a main control circuit and a displacement control circuit, and the main control circuit is connected with the displacement control circuit; The displacement control circuit comprises at least one digital potential module, and the digital potential module comprises a potential processing unit, a decoder and a digital potential application circuit; The output end of the potential processing unit is connected with the input end of the decoder and the input end of the digital potential application circuit, the output end of the decoder is connected with the input end of the digital potential application circuit; The decoder is used to receive the set output signal of the potential processing unit, form a chip selection signal for controlling the digital potential application circuit and send the chip selection signal to the digital potential application circuit.

2. The magnetic suspension high-speed motor controller according to claim 1, wherein: The decoder comprises a decoder integrated circuit, the digital potential application circuit comprises a digital potential meter, and the IO signal output by the IO interface circuit of the potential processing unit is decoded by the decoder into a chip selection signal for controlling the digital potential meter in the digital potential application circuit.

3. The magnetic suspension high-speed motor controller according to claim 1, wherein: The displacement control circuit comprises a zero position control circuit and an amplitude position control circuit, and the zero position control circuit is connected with the amplitude position control circuit.

4. The magnetic suspension high-speed motor controller according to claim 3, wherein: The zero position control circuit comprises a first chip U11, an eighth A chip U8A, a second capacitor C2, a first ninth resistor R19 and a second fifth resistor R25, and the amplitude position control circuit comprises a first sixth chip U16 and an eighth B chip U8B and a fifth first resistor R51; The output end of the eighth A chip U8A is connected with the positive phase input end of the eighth B chip U8B, the positive phase input end of the eighth A chip U8A is respectively connected with the second end of the first ninth resistor R19, the first end of the second fifth resistor R25 and the first end of the second capacitor C2, the first end of the first ninth resistor R19 is connected with the POW pin of the first chip U11, and the second end of the second fifth resistor R25 and the second end of the second capacitor C2 are grounded; The inverting input end of the eighth B chip U8B is respectively connected with the POB pin of the first sixth chip U16 and the first end of the fifth first resistor R51, the second end of the fifth first resistor R51 is grounded, and the output end of the eighth B chip U8B is connected with the POW pin of the first sixth chip U16.

5. The magnetic suspension high-speed motor controller according to claim 4, wherein: The first chip U11 and the first sixth chip U16 are digital potential meters, and the eighth A chip U8A and the eighth B chip U8B are operational amplifiers.

6. The magnetic suspension high-speed motor controller according to claim 4, wherein: The displacement control circuit further comprises a differential circuit and a low-pass filter circuit; The differential circuit comprises a fifth A chip U5A, a fourth fifth capacitor C45, a fourth sixth capacitor C46, a seventh fourth resistor R74, a seventh fifth resistor R75, a seventh sixth resistor R76 and a seventh seventh resistor R77. The low-pass filter circuit comprises a fifth seventh capacitor C57, a sixth third capacitor C63, a first resistor R1, a seventh resistor R7, a first third resistor R13; The inverting input end of the fifth A chip U5A is connected with the second end of a seventh fourth resistor R74, the second end of a seventh fifth resistor R75 and the second end of a fourth sixth capacitor C46 respectively; The output end of the fifth A chip U5A is connected with the first end of the seventh fourth resistor R74, the first end of the fourth sixth capacitor C46 and the first end of the first resistor R1 respectively; The second end of the first resistor R1 is connected with the second end of the seventh resistor R7, the first end of the first third resistor R13 and the first end of the fifth seventh capacitor C57 respectively; and the second end of the fifth seventh capacitor C57 is grounded. The output end of the eighth A chip U8A is connected with the first end of the seventh resistor R7 and the first end of the sixth third capacitor C63 respectively; and the inverting input end of the eighth A chip U8A is connected with the second end of the first third resistor R13 and the second end of the sixth third capacitor C63 respectively.

7. The magnetic levitation high-speed motor controller according to claim 6, characterized in that: The fifth A chip U5A is an operational amplifier.

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